Namib desert is the oldest desert in the world. The coastal desert rans from Angola ,Namibia and South Africa. It is recorded that the arid conditions have prevailed for around 55 millon years . It's one of the vastest deserts in the world Receiving an average of 2 to 5 mm rainfall per year . it's the home to the tallest sand dunes that exceed the height of 980ft.
Sahara desert is the largest hot desert in the world. The desert is very large that it's size can be compared with United States. The lack of rainfall and very dry winds have shaped the landform of this desert. It's filled with dry valleys, dry lakes and salt flats. The desert is still expanding and it often experiences snowfall during December to February because of lack of humidity . These desert is very hot and dry which has made survival of humans and animals very hard
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